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Number of nX6 0..3 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling three no more than once.
1

%I #4 Feb 20 2016 10:27:18

%S 2592,472044,84310620,13753913556,2135938293684,320994710282892,

%T 47121391706947500,6796525936086462132,966936595386067680804,

%U 136062368474581143710892,18974537404982889834704892

%N Number of nX6 0..3 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling three no more than once.

%C Column 6 of A269201.

%H R. H. Hardin, <a href="/A269199/b269199.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A269199/a269199.txt">Empirical recurrence of order 42</a>

%F Empirical recurrence of order 42 (see link above)

%e Some solutions for n=2

%e ..0..0..0..2..0..1. .0..0..1..3..1..3. .0..3..2..0..0..2. .0..2..0..2..2..2

%e ..0..0..2..0..2..2. .2..0..2..1..1..3. .2..0..2..0..0..0. .0..1..0..0..3..3

%Y Cf. A269201.

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 20 2016